Lion
- Mana Drain level 4 increased from 100 to 120 per second
- Mana Drain now drains at 0.25 second intervals instead of 1 second (596884)

Lord of Avernus
- Aphotic Shield will explode at the end of its duration if it has not taken sufficient damage
- Aphotic Shield cooldown decreased from 18/15/12/9 to 14/12/10/8
- Aphotic Shield cast range increased from 450 to 500

- No longer changes the scale of the purge per level (was negligible), now recovers at a medium rate always
- Instead of checking to stone units over the first 0.6 seconds, it checks over the full 5 seconds.
- Units affected by the Stone Gaze cannot get reaffected during the application period
- Illusion & Summoned unit damage from 600/800/1000 to 500/1000/1500
- Manacost from 100/50/0 to 200/100/0
- Cooldown from 100 to 140/110/80

Naga Siren
- Ensnare cast range increased from 620/630/640/650 to 650
- Song of the Siren AoE increased from 750 to 1250
- Song of the Siren's End ability is now available 0.5 seconds after casting (484587)

If you take more than 3 instances of damage (greater than 20) in the past 10 seconds, the item temporarily breaks and becomes basic boots (until the last 10 seconds don't have 3 instances). Same damage source rules as Blink Dagger.

Veil of Discord
- Recipe now requires only one Robe of the Magi, completed bonuses are the same

Gameplay & Cosmetics:

- Significant changes to couriers

- Couriers now give 150 to each enemy player, instead of 300 to the killer.
- Couriers no longer drop items when they die
- Couriers respawn 3 minutes after death, the items they have are inaccesible during that time
- Flying courier no longer has invulnerability shield
- Basic courier is magic immune (like flying courier, most spells did not work on couriers already)

- Buyback cooldown increased from 4 minutes to 5
- Heroes now respawn with full mana
- Gold over time from 0.875 intervals to 0.8
- Runes will no longer spawn the same rune type 2 times in a row
- Added Treant Protector, Terrorblade and Tuskarr to Captain's Mode

* Added a 0.2 second buffer time between Chainfrost bounces (to prevent instant explosions for nearby units after the most recent code change)
* Fixed Dreamcoil damaging but not stunning invis heroes if they leave the range while still under the effect
* Fixed Tiny's damage not being displayed when he upgrades with Aghanim
* Fixed some rare bugs with some effects being invisible depending on where your camera was
* Fixed the pathing type on Enraged Wildkin's Tornado
* Fixed Bloodlust Multicast to affect necronomicon units
* Fixed Glaives Throwers having different attack point than Meat Wagons
* Fixed issue with Open Wounds when used on neutrals
* Fixed some inconsistincies on the attack animation time between ghouls and treants
* Fixed Focus Fire interaction with Linken Sphere
* Fixed Laser interaction with Linken Sphere
* Fixed Open Wounds not working properly sometimes when the target is in fog of war
* Fixed Refraction damage status icon lingering a little after its gone